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Cheap flights from Knoxville to Portugal from $430

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Portugal departing on 2/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Knoxville to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
7:00 am - 11:15 pm
TYS
-
LIS
35h 15m
2 stops
British Airways Logo
6:45 pm - 9:57 pm
LIS
-
TYS
32h 12m
2 stops
$511British Airways
Wed, Apr 22 - Tue, May 5
British Airways Logo
2:49 pm - 2:10 pm
TYS
-
LIS
18h 21m
2 stops
British Airways Logo
11:05 am - 9:57 pm
LIS
-
TYS
15h 52m
1 stop
$536British Airways
Wed, Apr 22 - Tue, May 5
Multiple Airlines Logo
5:48 pm - 10:15 pm
TYS
-
LIS
23h 27m
2 stops
Multiple Airlines Logo
1:00 pm - 10:49 am
LIS
-
TYS
26h 49m
2 stops
$538Multiple Airlines
Wed, Apr 22 - Tue, May 5
United Airlines Logo
7:20 pm - 10:30 am
TYS
-
LIS
10h 10m
1 stop
United Airlines Logo
7:25 am - 10:29 pm
LIS
-
TYS
20h 04m
2 stops
$540United Airlines
Sun, Apr 5 - Sat, Apr 18
United Airlines Logo
9:40 am - 10:30 am
TYS
-
LIS
19h 50m
1 stop
United Airlines Logo
5:05 am - 10:29 pm
LIS
-
TYS
22h 24m
2 stops
$541United Airlines
Sun, Apr 5 - Sat, Apr 18
United Airlines Logo
7:00 am - 10:30 am
TYS
-
LIS
22h 30m
2 stops
United Airlines Logo
7:25 am - 10:50 am
LIS
-
TYS
32h 25m
2 stops
$544United Airlines
Sun, Apr 5 - Sat, Apr 18
British Airways Logo
11:42 am - 4:25 pm
TYS
-
LIS
23h 43m
2 stops
British Airways Logo
7:10 am - 8:18 pm
LIS
-
TYS
18h 08m
2 stops
$608British Airways
Sun, Apr 5 - Sat, Apr 18
Multiple Airlines Logo
6:38 pm - 10:55 pm
TYS
-
FNC
24h 17m
2 stops
Multiple Airlines Logo
6:10 pm - 9:05 pm
FNC
-
TYS
30h 55m
2 stops
$974Multiple Airlines
Thu, Mar 19 - Thu, Mar 26
Air Canada Logo
9:40 am - 1:15 pm
TYS
-
FNC
23h 35m
3 stops
Air Canada Logo
9:25 am - 10:50 am
FNC
-
TYS
30h 25m
3 stops
$2,502Air Canada
Sun, Mar 22 - Sun, Mar 29
Air Canada Logo
9:40 am - 1:30 pm
TYS
-
FNC
23h 50m
3 stops
Air Canada Logo
7:55 am - 10:49 am
FNC
-
TYS
30h 54m
3 stops
$2,706Air Canada
Thu, Mar 19 - Thu, Mar 26

United Airlines flights from Knoxville to Portugal

Our best United Airlines deals on Knoxville to Portugal flight tickets
United Airlines
Apr 5
TYS7:20 pmKnoxville McGhee Tyson
10h 10m
1 stop
LIS10:30 amLisbon Humberto Delgado
Apr 18
LIS7:25 amLisbon Humberto Delgado
20h 04m
2 stops
TYS10:29 pmKnoxville McGhee Tyson
$540
United Airlines
Apr 5
TYS9:40 amKnoxville McGhee Tyson
19h 50m
1 stop
LIS10:30 amLisbon Humberto Delgado
Apr 18
LIS5:05 amLisbon Humberto Delgado
22h 24m
2 stops
TYS10:29 pmKnoxville McGhee Tyson
$541
United Airlines
Apr 5
TYS7:00 amKnoxville McGhee Tyson
22h 30m
2 stops
LIS10:30 amLisbon Humberto Delgado
Apr 18
LIS7:25 amLisbon Humberto Delgado
32h 25m
2 stops
TYS10:50 amKnoxville McGhee Tyson
$544

British Airways flights from Knoxville to Portugal

Our best British Airways deals on Knoxville to Portugal flight tickets
British Airways
Apr 22
TYS7:00 amKnoxville McGhee Tyson
35h 15m
2 stops
LIS11:15 pmLisbon Humberto Delgado
May 5
LIS6:45 pmLisbon Humberto Delgado
32h 12m
2 stops
TYS9:57 pmKnoxville McGhee Tyson
$511
British Airways
Apr 22
TYS2:49 pmKnoxville McGhee Tyson
18h 21m
2 stops
LIS2:10 pmLisbon Humberto Delgado
May 5
LIS11:05 amLisbon Humberto Delgado
15h 52m
1 stop
TYS9:57 pmKnoxville McGhee Tyson
$536
British Airways
Apr 5
TYS11:42 amKnoxville McGhee Tyson
23h 43m
2 stops
LIS4:25 pmLisbon Humberto Delgado
Apr 18
LIS7:10 amLisbon Humberto Delgado
18h 08m
2 stops
TYS8:18 pmKnoxville McGhee Tyson
$608

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Knoxville to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

7:00 am-11:15 pm

2 stops35h 15m

Lisbon Humberto Delgado

Tue 5/5

6:45 pm-9:57 pm

2 stops32h 12m

$511

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

2:49 pm-2:10 pm

2 stops18h 21m

Lisbon Humberto Delgado

Tue 5/5

11:05 am-9:57 pm

1 stop15h 52m

$536

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

5:48 pm-10:15 pm

2 stops23h 27m

Lisbon Humberto Delgado

Tue 5/5

1:00 pm-10:49 am

2 stops26h 49m

$538

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 4/5

7:20 pm-10:30 am

1 stop10h 10m

Lisbon Humberto Delgado

Sat 4/18

7:25 am-10:29 pm

2 stops20h 04m

$540

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 4/5

9:40 am-10:30 am

1 stop19h 50m

Lisbon Humberto Delgado

Sat 4/18

5:05 am-10:29 pm

2 stops22h 24m

$541

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 4/5

7:00 am-10:30 am

2 stops22h 30m

Lisbon Humberto Delgado

Sat 4/18

7:25 am-10:50 am

2 stops32h 25m

$544

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sun 4/5

11:42 am-4:25 pm

2 stops23h 43m

Lisbon Humberto Delgado

Sat 4/18

7:10 am-8:18 pm

2 stops18h 08m

$608

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Thu 3/19

6:38 pm-10:55 pm

2 stops24h 17m

Funchal Madeira

Thu 3/26

6:10 pm-9:05 pm

2 stops30h 55m

$974

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Sun 3/22

9:40 am-1:15 pm

3 stops23h 35m

Funchal Madeira

Sun 3/29

9:25 am-10:50 am

3 stops30h 25m

$2,502

KnoxvilleFunchal

TYS - FNC

TYSFNC

Knoxville McGhee Tyson

Thu 3/19

9:40 am-1:30 pm

3 stops23h 50m

Funchal Madeira

Thu 3/26

7:55 am-10:49 am

3 stops30h 54m

$2,706

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Knoxville to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Knoxville is in January. Flight prices, which tend to average around $502, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Knoxville during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $628.

Can stopping save me money on Knoxville to Portugal flights?

You could potentially save up to 35% on your flight if you consider stops on a Knoxville to Portugal flight.

Cheap Knoxville to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Portugal

Fastest flight time

10h 10m

Direct flights

None
The fastest flight from Knoxville to Portugal takes 10h 10m
There are no direct flights from Knoxville to Portugal. There are no popular flight routes from Knoxville to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Portugal?

    Prices for flights from Knoxville McGhee Tyson Airport to Portugal were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Portugal?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Portugal?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Knoxville to Portugal

Compare and see reviews for airlines that fly from Knoxville to Portugal with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $477Free CancellationRating
6.7
7,716 reviews
Search British Airways flights
United AirlinesPriceFrom $633Free CancellationRating
7.4
9,240 reviews
Search United Airlines flights
American AirlinesPriceFrom $683Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Portugal with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Portugal flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Portugal?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Portugal from Knoxville.

I’m not ready to book a flight from Knoxville to Portugal right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Knoxville to Portugal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to Portugal

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Popular flights according to clicks in the last 7 days on momondo
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